Sodium Rain

I'm doing a calculation at the moment to determine the average energy output (in gigajoules per hectare), that would be required to produce 200 exa-joules (200 quintillion joules) of energy, from 10% of the 87 million square kilometres of forest, pasture and food crops that cover the land surface of this planet. :O(

No bloody wonder I forgot to blip until it was dark, raining and nasty, and I realised I should have been out enjoying myself and using up some of my own energy.